Spike: verify historical candle depth, licensing and acquisition options

[carndog]

Question

What historical market data can legally and reliably support deterministic replay for the chosen instruments and intervals?

Evidence required

• Verify official eToro candle intervals, maximum response size, retention/depth, and pagination behaviour
• Confirm whether bulk historical extraction and local retention are permitted
• Compare at least one licensed alternative where eToro history is insufficient
• Record symbol/exchange mapping, timezone, corporate-action, and missing-bar behaviour
• Estimate storage, API, and acquisition cost before purchasing anything
• Produce a small sanitized sample and acquisition proof
• Recommend a source per required instrument class and interval
• Record a go/no-go ADR

Exit condition

No paid data purchase is made without explicit cost approval.